Finding the Third Proportional to 191,287 and 280,786

Step by Step Solution

1. Step 1: Write the proportion equation
   191,287 : 280,786 = 280,786 : x
2. Step 2: Convert to fraction form
   191,287/280,786 = 280,786/x
3. Step 3: Cross multiply
   191,287x = 280,786 × 280,786
4. Step 4: Simplify right side
   191,287x = 78,840,777,796
5. Step 5: Solve for x
   x = 78,840,777,796/191,287
6. Step 6: Final answer
   x = 412,159.62